SDK Version 2.5
SDK Version 2.5 has support for the older cameras and interfaces. Supported OS's are Windows 9x, Windows NT 4.0, Win2K and WinXP. Version 2.5 does not support the newer cameras like A320G, A320 and SC640.

SDK Version 2.6
SDK Version 2.6 has support for A20, A40, A320G, A320, SC640 and SC4000/6000. It does not support the older TAXI-interface. Supported OS's are Win2K, WinXP and Windows Vista.